You'd never know it's him behind that green face, but this summer, Paul will be playing Slimer in a Ghostbusters-themed Papa John's commercial, a.k.a. Papa's best customer. Paul had a blast providing the motion capture and sound effects for the iconic character in the new ad, which airs nationwide this summer. Keep an eye out for him gobbling down those Papa John's slices with a vengeance. Who ya gonna call?